<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    table {
      border-collapse: collapse;
    }

    td {
      border: 1px solid black;
    }
  </style>
</head>

<body>
  <script>
    // 99乘法表
    document.write("<table>")
    for (var i = 1; i < 9; i++) {
      document.write("<tr>")
      for (var j = 1; j < i + 1; j++) {
        document.write(`<td>${j} * ${i} = ${i * j} </td>`)
      }
      document.write("</tr>")
    }
    document.write("</table>")
  </script>
</body>

</html>